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Irem M10: first results from schematics

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* Updated video timing and cpu/pixel clocks
* Rewrote irq for m10/m11 to use two 74LS123
This commit is contained in:
Couriersud 2008-11-03 01:19:51 +00:00
parent 17b6c56de9
commit f9029d88a5
2 changed files with 68 additions and 13 deletions
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69
src/mame/drivers/m10.c
View File

@ -90,7 +90,7 @@ Notes (couriersud)
From http://www.crazykong.com/tech/IremBoardList.txt
skychut: M-11
skychut: M-11 (?)
andromed: N/A
ipminvad: N/A
spacbeam: not listed
@ -111,7 +111,9 @@ Notes (couriersud)
***************************************************************************/
#include "driver.h"
#include "machine/rescap.h"
#include "sound/samples.h"
#include "machine/74123.h"
#include "m10.h"
@ -121,7 +123,45 @@ Notes (couriersud)
*
*************************************/
#define DEBUG (0)
#define DEBUG (1)
static WRITE8_DEVICE_HANDLER(ic8j1_output_changed)
{
printf("ic8j1: %d %d\n", data, video_screen_get_vpos(device->machine->primary_screen));
cpunum_set_input_line(device->machine, 0, 0, !data ? CLEAR_LINE : ASSERT_LINE);
}
static WRITE8_DEVICE_HANDLER(ic8j2_output_changed)
{
/* written from /Q to A with slight delight */
printf("ic8j2: %d\n", data);
ttl74123_a_w(device, 0, data);
ttl74123_a_w(devtag_get_device(device->machine, TTL74123, "ic8j1"), 0, data);
}
static const ttl74123_config ic8j1_intf =
{
/* completely illegible */
TTL74123_NOT_GROUNDED_DIODE, /* the hook up type */
RES_K(1), /* resistor connected to RCext */
CAP_U(1), /* capacitor connected to Cext and RCext */
1, /* A pin - driven by the CRTC */
1, /* B pin - pulled high */
1, /* Clear pin - pulled high */
ic8j1_output_changed
};
static const ttl74123_config ic8j2_intf =
{
TTL74123_NOT_GROUNDED_DIODE, /* the hook up type */
/* 10k + 20k variable resistor */
RES_K(22), /* resistor connected to RCext */
CAP_U(2.2), /* capacitor connected to Cext and RCext */
1, /* A pin - driven by the CRTC */
1, /* B pin - pulled high */
1, /* Clear pin - pulled high */
ic8j2_output_changed
};
/*************************************
*
@ -420,13 +460,19 @@ static WRITE8_HANDLER( m15_a100_w )
static READ8_HANDLER( m10_a700_r )
{
//printf("rd:%d\n",video_screen_get_vpos(machine->primary_screen));
cpunum_set_input_line(machine, 0, 0, CLEAR_LINE);
printf("clear\n");
ttl74123_clear_w(devtag_get_device(machine, TTL74123, "ic8j1"), 0, 0);
ttl74123_clear_w(devtag_get_device(machine, TTL74123, "ic8j1"), 0, 1);
return 0x00;
}
static READ8_HANDLER( m11_a700_r )
{
//printf("rd:%d\n",video_screen_get_vpos(machine->primary_screen));
//cpunum_set_input_line(machine, 0, 0, CLEAR_LINE);
printf("clear\n");
ttl74123_clear_w(devtag_get_device(machine, TTL74123, "ic8j1"), 0, 0);
ttl74123_clear_w(devtag_get_device(machine, TTL74123, "ic8j1"), 0, 1);
return 0x00;
}
@ -460,16 +506,18 @@ static TIMER_CALLBACK( interrupt_callback )
}
#if 0
static INTERRUPT_GEN( m11_interrupt )
{
cpunum_set_input_line(machine, 0, 0, ASSERT_LINE);
timer_set(video_screen_get_time_until_pos(machine->primary_screen, IREMM10_VBEND, 0), NULL, -1,interrupt_callback);
//timer_set(video_screen_get_time_until_pos(machine->primary_screen, IREMM10_VBEND, 0), NULL, -1,interrupt_callback);
}
static INTERRUPT_GEN( m10_interrupt )
{
cpunum_set_input_line(machine, 0, 0, ASSERT_LINE);
}
#endif
static INTERRUPT_GEN( m15_interrupt )
{
@ -769,7 +817,7 @@ static MACHINE_DRIVER_START( m10 )
MDRV_MACHINE_RESET(irem)
MDRV_CPU_VBLANK_INT("main", m10_interrupt)
//MDRV_CPU_VBLANK_INT("main", m10_interrupt)
/* video hardware */
MDRV_SCREEN_ADD("main", RASTER)
@ -783,6 +831,13 @@ static MACHINE_DRIVER_START( m10 )
MDRV_VIDEO_START(m10)
MDRV_VIDEO_UPDATE(m10)
/* 74LS123 */
MDRV_DEVICE_ADD("ic8j1", TTL74123)
MDRV_DEVICE_CONFIG(ic8j1_intf)
MDRV_DEVICE_ADD("ic8j2", TTL74123)
MDRV_DEVICE_CONFIG(ic8j2_intf)
/* sound hardware */
MDRV_SPEAKER_STANDARD_MONO("mono")
@ -798,10 +853,10 @@ static MACHINE_DRIVER_START( m11 )
/* basic machine hardware */
MDRV_IMPORT_FROM(m10)
MDRV_CPU_REPLACE("main", M6502,IREMM10_CPU_CLOCK / 2)
MDRV_CPU_REPLACE("main", M6502,IREMM10_CPU_CLOCK)
//MDRV_CPU_MODIFY("main")
MDRV_CPU_PROGRAM_MAP(m11_main,0)
MDRV_CPU_VBLANK_INT("main", m11_interrupt)
//MDRV_CPU_VBLANK_INT("main", m11_interrupt)
/* sound hardware */
MACHINE_DRIVER_END

12
src/mame/includes/m10.h
View File

@ -5,14 +5,14 @@
****************************************************************************/
#define IREMM10_MASTER_CLOCK (25000000)
#define IREMM10_MASTER_CLOCK (12500000)
#define IREMM10_CPU_CLOCK (IREMM10_MASTER_CLOCK/20)
#define IREMM10_PIXEL_CLOCK (IREMM10_MASTER_CLOCK/5)
#define IREMM10_HTOTAL (318)
#define IREMM10_HBSTART (248)
#define IREMM10_CPU_CLOCK (IREMM10_MASTER_CLOCK/16)
#define IREMM10_PIXEL_CLOCK (IREMM10_MASTER_CLOCK/2)
#define IREMM10_HTOTAL (360) /* (0x100-0xd3)*8 */
#define IREMM10_HBSTART (248)
#define IREMM10_HBEND (8)
#define IREMM10_VTOTAL (262)
#define IREMM10_VTOTAL (281) /* (0x200-0xe7) */
#define IREMM10_VBSTART (240)
#define IREMM10_VBEND (16)